Pneumatic for wind instruments.



W. B. TUNSTALL.

PNEUMATIC FOE WIND INSTRUMENTS. I

APPLICATION FILED MAY 22, 1908.

Patented June 29, 1909.

11., wumuarou, n. c.

UNITED STATES PATENT WILLIAM B. TUNSTALL, O1 HELROSE, MASSAOHUSIZ ITS, ASS] GEOR- OF ONE-HALF TO COLE & TREAT 00., OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

PNEULIATIC FOR WIND INSTRUMENTS.

Application filed May 22, 1968.

To all whom it may concern:

Be it known that I, WILLIAM B. TUNSTALL, a citizen of the United States, residing at Melrose, in the county of lvfiddlesex and State of fifassachusetts, have invented a new and useful Pneumatic for find Instruments, of which the following is a specification.

This invention relates to a pneumatic and valve for wind instruments.

The principal objects of the invention are to provide a rigid and firm construction which can be set up and taken down in a very simple manner, and which is adapted to operate a valve for controlling an air channel in an efficient and convenient manner; also to provide certain improvements in details of construction of the pneumatic and in the manner of connecting it with the instrument.

Further objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawing which shows a sectional view of a pneumatic constructed according to this invention and applied to an ordinary type of organ.

The invention is illustrated as applied to an instrument having a pressure chamber 10 located adjacent to a plate 11 having a set of channels 12 connected with the pipes of the instrument, and a set of channels 13 communicating with the pressure chamber through ports 14 each controlled by a valve 15. This valve is shown as being operated by a pneumatic 16 communicating with a channel 17 leading from the key action. Over each channel 13 is placed a block 20 having a port 21 therethrough communicating with the channel 13. This block projects out from the face of the plate 11 a considerable distance and upon it is fixed by means of screws or in any other desired manner, the stationary leaf 22 of the pneumatic which is designed to operate the valve 23 which controls the channel 12. This stationary leaf is provided wit-h a longitudinal passage 24 communicating through a port 25 with the port 21 and channel 13. The passage 24 extends out into the interior of the pneumatic and is bounded on one side by a wall 26 having a slanting side 27. At the end of this slanting side nearest the plate 11 the movable leaf 28 of the pneumatic is pivoted. It will be seen that this part of the pneumatic projects inwardly toward the plate Specification of Letters Patent.

Patented June 29, 1909.

Serial No. 434,261.

1.1 in the space afforded by the location of the pneumatic on the block 20. (onsequently as the valve 23 is located on the outside of the movable leaf 2S, and as the slanting surface 27 constitutes a stop for the in ward motion of the movable leaf, it will be seen that the parts are most conveniently located for performing the desired. functions. They can be set up in position in a very convenient manner, and they are so constructed that when put in position they are rigid and not likely to get out of order. The control of the v: We 23 is perfect, and the construction by which it is brougl'it about is most simple and inexpensive. A simple and convenient form of spring is also shown. It consists of a single piece of wire 30 fixed into the back of the stationary leaf of the pneumatic, and extending around over the end of the same into a recess in the end of the movable leaf.

The device can be applied to suction i11- struments and may be used in many ways other than that shown.

The operation is as follows: Upon the venting of the tube 17 at the key-board, the pneumatic 16 is deflated, by the movement of valves 15 toward the pneumatic 16 by rea son of air pressure in the chest 10, which cuts the passage 14 off from the chamber 10, and connects it with the outer air. This vents the interior of the power pneumatic which is then collapsed by the pressure in the chamber 10 against the movable leaf 2S.

Vhile l have illustrated and described certain details of construction, and shown the invention as applied to one type of wind instrument, I am aware that many modifications may be made therein and that it can be applied to other kinds of instruments by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore, I do not wish to be limited to all the details of construction, or the form of instrument shown, but

Vi hat I do claim is 1. A pneumatic comprising a stationary leaf having at one end means for securing it in fixed position, a wall extending from said means toward the other end of the stationary leaf and provided with a surface slanting at an angle to the fixed leaf, a movable leaf pivoted at the end of said slanting surface which is most remote from the fixed leaf, whereby said surface constitutes a stop for the movable leaf, and a passage between said Wall. and the stationary leaf and extending through the stationary leaf.

2. A valve operating pneumatic comprising a fixed leaf having a longitudinal passage therethrough communicating with the interior of the pneumatic, a movable leaf, a valve on the outside of the movable leaf, and a spring connected with the end of the movable leaf and extending around the outside of the pneumatic and fixed to the opposite side of the fixed leaf.

3. In a pneumatic, the combination of a stationary leaf having a longitudinal passage communicating with the interior and having a wall bounding the inner side of said passage at one end and provided with an outer face at an angle to the stationary leaf, and a movable leaf pivoted to the edge of said outer face, whereby said wall acts as a support and as a stop for the movable leaf.

4. In a pneumatic musical. instrument, the combination of a pressure chamber, a pneumatic therein having a longitudinal passage, a channel communicating with said passage and also communicating With said pressure chamber, a valve in said chamber for controlling said channel, a second channel normally communicating with said pressure chamber, said pneumatic having a movable leaf, and a valve for closing the second channel controlled by said movable leaf.

In testimony whereof I have hereunto set my hand, in the presence of two subscribing witnesses.

WILLIAM B. TUNSTALL. IVitnesses:

WM. N. FoLsoM, EMILY F. RIoRDAN. 

